Method and apparatus for making plate glass



Jan, 27, 1925.

F. V. KESSELMAN METHOD AND APPARATUS FOR MAKING PLATE GLASS Filed July 24, 1922 3 Sheets-Sheet l lllillllb l ll INVENTOR Jan, 27, @925. 1.524379 v. KEssELMAN I METHOD AND APPARATUS FOR MAKING PLATE GLASS Filed July 24. 1922 3 Sheets-Sheet 2 FIG 2' Mgr INVE TOR zA/LM @owlm F. V. KESSELMAN METHOD AND APPARATUS FOR MAKING PLATE GLASS Filedjuly 24. 1922 3 Sheets-Sheet 3 Patented Jan.

METHOD AND APPARATUS FOR MAKING PLATE GLASS.

Application filed July 24,

To all whom it may concern:

hat I, FLorn V. KESSELMAN,

Be it known t a citizenof the of Butler, in the coun of Pennsylvania,

useful Improve paratus for Ma hereby declare clear, and

My invention United States,

have invented a ment in Methods king Plate Glass;

and resident ty of Butler and State new and and Apand I do the following to be a full,

relates to exact-dflfiQription thereof.

the manufacture of plate glass by casting and rolling.

my invention is to cast high- The object of quality plate for automobile In an application for Le rial No. 577,06

glass in plate wind-shiel s and 8, filed July 24th such as are used windows.

tters Patent, Se-

have described a method and apparatus for only, and I mon tracks across and above According object o casting. a rotary two casti f casting are deposited suctables arplatform which ssi on beneath the to my present inng tables nt these tables upon parallel 'hich is arranged a third track supporting a carriage which is moved above which position to the the two par nate'ly. The carriage ear when the carriage passes from one move lengthwise be other,

allel tracks alterries a pair of rolls neath a glass feeder which deposits a mass of glass between the preventing the gia the rolls until brought above the table on stopper for' ing between parallel tracks, removed and th the glass into a casting table.

rolls.

whereupon e plate which falls At this time, the

moved at a speed corresponding to of the forming "ceive rolls,

the discharged plate of glass.

plate is thus being formed upon casting tables another casting brought up on the other track, and

forming rolls discharge the plate of and theroli carriage i's stopper is repla moved across to a track, receiving :1 passes beneath the cod position above glass are thus formed alternately site sides" of the glass feeder, and t I provide a ss from flowthe carriage is one of the two the stopper is rolls are operated to form upon the table is the speed so as to properly re- W'hile a ne of the table is after the glass the the other charge of glass as it glass feeder. Plates of on oppohe opera- 1s'22.; Serial No. 577,069.

'-tion is contin erly supplied.

The glass feeder which deposits the glass ween the rolls may be of-the gob-feeding type which is employed in the man of bottles and maybe of the casting. The l uous as long as glass is propother hollow glassware, or it type suIt-able for plate glass atter form of feeder is scufacture lected for illustration in the accompanying drawing. 4

In the drawing, Fig. 1 is a plan view showing the essential parts of a casting sy'stern constructed in accordance with my inmg tables; and Fig. 6 is a fragmentary horizontal sectional view through one end of the set ofglassforming rolls, showing the circular knife for cutting the edgesof the glass sheets. a

In the drawing 'the numerals 2 and 3 indicate casting tables which are provided with wheels t running upon parallel tracks 5 and 6, respectively. Across and above the tracks 5 and 6 is another set'of tracks 7 upon which is mounted a carriage 8 having wheels 9 which run upon the tracks 7, and also having a motor and gearing for moving the carriage on the tracks 7. Since these power connections are such as are 0rdinarily provided on glass casting carriages they are omitted from the sake of clearness. Two glass-forming rolls l0 and.ll, carried by horizontal shafts 12 and 13, respectively, are mounted in suitable bcarings on the carriage 8 and are connected to rotate together by means of meshing gears l4 and 15 secured to the shafts 12 and 13. The gear 14; is driven from an electric motor 16. through a pinion 17 S0". cured to the armature shaft 18 of the motor;

Wis

drawing for theone of the castand is driven at the same peripheral speed as the rolls 1'0 and 11, or 'at'sli'ghtly greater speed, through .a gear- 22 meshing with a of the desired plate that is to be formed. In

tached for forcing the stopper 25 order to prevent the glass from flowing between the rolls when it is deposited thereon by the feeder, a stopper 25 is arranged to'be inserted from beneath into the space between the rolls and to be thereafter removed to permitthe glass to pass between the rolls.

or this purpose the stopper 25 is suspended from' two arms 26 which, as shown, are

mounted loosely on the shaft 13 of the roll' 11. One'of the arms 26 is provided with a handle 27 to which a. weight 28 ma be attween the rolls'when the handle 27 is in .its lower position, as shown on Fig. 3. This weight also holds the stopper 25 withdrawn and the handle 27 in its upper position while the glass is beingrolled. Various other means may of course be employed for operating the stop er 25.

Aiiove the carriage 8, and between the parallel=tracks 5 and 6, is a glass feeder which, as stated above, may be of any suitable type which is capable of dischargingthe glass in discontinuous streams or gobs. A. gob feeder such as. I have shown in my copending application, Serial No. 577,068

may be employed equally well. As shown.

on the drawing, the feeder comprises a glass rcce tacle having a downwardly opening disc ar e outlet 31 formed in a bushing 32, and a p unger 33-adapted to reciprocate vertically above the outlet 31 to open and close the outlet. This type of feeder may also be provided with some means for disposing of the chilled glass which forms in the intervals between the glass-dischar ing operations, andfor permittin the glass to issue with a clean and hot lea ing end. Such devices are not shown on the present drawing, since these details form no. part-of my present invention. 5 i

Another feature of my, invention is the provision of knives upon the plate-forming rolls for trimming the edges of the plate as it is formed, and thus; "'lvingl the plate a clean edge instead .of the rough ed es which are left by the ordinary casting. ro Is, and saving the expense of trimming the plate after it is cast. These knives. as shown in the drawing, consist of rings 40 secured to the ends of the roll 10 by means of screws 41,

- r 0t rwise, and provided with circular :-.nifc ed es 42. The rings 40 are preferably composed of hardened steel and may be removed for sharpening or for replacementwhen worn out.

Fig. 2 shows the relative position of the carriage 8 and the table 3 at the beginning s 10 and 11 are- ,of the operation of forming a plate of glass upon the table 3. A stream or gather of lass, the section of which is indicated in dotted lines at A, is being discharged from the glass feeder. As the leading end of the gather'A reaches the rolls 1t) and 11, the carriage -8 is moved to the right, Figs. 1, 2 and 4, thus receiving the glass in a uniform mass B, Figs. 3 and 4. The stopper 25 at this time is in the position shown in Fig. 3, and the glass therefore remains between the rolls until the carria e is advanced onthe track 7 to a. position shove the table 3. The stopper 25 is then withdrawn and the motor 16 is started to rotate the rollers 10 and 11 in the direction of the arrows on Figs. 3 and 5. This forces the glass down between the rolls in the form of a sheet or plate C. The table 3, which is provided with the usual motor and gearing for advancing it on the tracks 6, is started in mo-. tion as the leading end of the date C reaches the surface of the table, and tie plate there after follows. the periphery of the roll 11, as shown in Fig. 5, the roll 11 thus act-in somewhat in the a .me manner as the usua casting-table roll. The smoothing roll 21 engages the surface of the plate C and smooths out any irregularities that may be left by the forming rolls. After receivin the plate 0 the table 3 continues on thetracfi 6 to a suitable point, where the sheet- C is removed, after which the table'3 is returned to its original position, as shown on Fig. 1 of the drawing.

Meanwhile, the stopper 25 has been returned to the position shown in Fig. 3 and the carriage 8 has been'moved across on'the track 7 to a position above the table 2' on track 5. During this movement another mass of glass is deposited-between the rolls 10 and 11 in the manner described above, and this glass is thenformed into a plate 11' on the table 2 in the same manner as the p ate C was formed on the table 3. This operation .is continued at suitable intervals, the

flow of glass being) of course inter uptcdb the plunger 33 or y other means after can 1 gather of glass is deposited between the late-forming rolls. As each plate is ormed, its edges are trimmed by the knives 42.

I am aware that sheets of glass have heretofore been formed by extruding the glass between two horizontal rolls, but in all such prior methods it has been thought necessary "to bring the glass to the rolls in a body'as' widens the rolls,'special. discharge spouts or ladies being employed for thispurpose. I believe that Lain the first to lay an elongated-mass of glass progressively between two sheet-forming{rolls for the production ofplate glass, and to employ a reciprocatclaims. It will also be understood that the -term plate glass as used herein, is not -restricted to a polished, but includes fiat glass of any kind,

glass that is ground and whether" polished or 'not. I claim as my invention:

1.- The method of making plate glassthat comprises depositin a stream of molten glass of substantially uniform cross sectional area upon a pair of cooperating rolls while said rolls are stationary, impartin relative movement as between said rolls an glass in a direction transversely of the flow of glass, and rotating said rolls to extrude the glass between them in sheet form.

'2. The method of making plate glass that comprises receiving a descend ng mass of glass between a pair of cooperating rolls,

producin relative movement between said mass of g ass and saidrolls todistribute said glass lengthwise between said rolls, and then rotating said rolls to extrude the said glass between them in sheet form.

3. The method of making, plate glass that comprises receiving a descending mass of glass between a longitudinally moving pair of cooperatin rolls and thenrotating'said rolls to extruge the said glass between them in sheet form. V I

4. The method of making plate glass that comprises recevin a descending stream or column of glass between a longitudinally moving pair of-cooperating rolls, and then rotatin said rolls to extrude the glass be tween them in sheet form. v

5. The method of makin plate glass that comprises distributing molten glass lengthwise between a pair of cooperating rolls, preventing the lass from flowing between said rolls while being so distributed, and then rotating said rolls and permitting the glass to be extruded between said rolls in sheet form.

(5. The method of making plate glass that comprises receiving a descending mass of glass between a pair of cooperating rolls, producing relative movement between said rolls and said glass to distribute said glass lengthwise jbetween said-rolls, preventing the glass from flowing between said rolls while being so distributed, and then rotating said rolls and pcrmittin the glass to be extruded between said rol s in sheet form.

7. The methodof making plate glass that comprises receiving a descending mass of glass between a longitudinally moving )air of cooperatin rolls, preventing the g ass from flowingbe and pqrmittin the glass to be extruded hetween said rol m cat form.

8.. The method of'making plate glassthat comprises receiving a descending stream or column of glass between a longitudinally them in sheet form.

9. The method of making plate glass that comprises receiving a descending stream of glass between a longitudinally moving pair of cooperating rolls, preventing the glass from flowing between said rolls while being so distributed, interrupting the fiow of said stream and then rotating said rolls and permitting the glass to be extruded between said rolls in sheet form.

10. Apparatus for making plate glass that comprises glass-feeding means for producing a descending mass of molten glass, a pair of cooperating rolls disposed beneath said glass-feeding means, means for producing relative movement between said glass and said rolls, thereby distributing'said glass lengthwise between said rolls, and means for rotating said rolls and for thereby extruding said glass form. v p

11. Apparatus for making plate lass comprising a pair of cooperating rolls iaving their adjacent edges spaced apart, means for depositing glass lengthwise between said rolls, a stopper for preventing said glass from flowing between said rolls while being so distributed, and means for rotatiilg said rolls and for thereby extruding said glass between said rolls in sheet form.

12. Apparatus for casting plate glass comprising glass-feeding means for producing a descending mass of molten glass, 11 pair of cooperating rolls adapted to receive said glass between them, means l ar producing relative movement between said glass and said rolls, thereby distributing said glass lengthwise between said rolls, a stopperducing a descending mass of molten g ass,

a longitudinally movable pair of cooperating rolls havin their adjacent surfaces spaced apart, said rolls being .movahlebe neath said descending glass, whereby said glass is deposited lengt wise between said rolls, a stopper adapted to be removably inserted beneath and between said rolleto prevent the glass from flowing between said rolls while beingso distributed, and means for rotating said rolls and for thereby ex between them in sheet .70 moving pair of cooperating ro'lls,'interrupt- 1 truding said glass between them in sheet orm.

14. Apparatus for making plate glass comprising a glass feeder, a carriage mo\'- able beneath said feeder, a pair of cooperating rolls mounted on said carriage in position to receive glass from said feeder between them, lneans for-preventing glass from flowing between said rolls while the glass is being deposited therebet-ween, and means for rotating said rolls to extrude glass between them in sheet form.

15. Apparatus for makinp plate glass comprising a glass feeder, a carriage movable beneath said feeder, a pair of cooperating rolls mounted on said carriage in positionto receive glass from said feeder between them, ineans for preventing glass from flowing between said rolls while the glass is being deposited therebetween, means for rotating said rolls to extrude glass between them in sheet. form, and tables dis posed on opposite sides of said feeder and adapted to receive the sheets of glass from said rolls.

16. Apparatus for makin; plate glass comprising a glass feeder, parallel tracks disposed below and on opposite sides of said feeder, casting tables carried by said tracks. a third track extendin across and above said first-named tracks an below said feeder, a carriage mounted on said last-named track for reciprocation below said feeder, and a pair of cooperating 'rolls mounted in said carriage and adapted to receive glassfrom said feeder between them.

17. Apparatus for kr'naking plate glass comprising a glass feeder, parallel tracks disposed below and on opposite sides of said feeder, casting tables carried by said tracks, a third track-extending across and above said first-named tracks and below said one of said casting tables.

18. Apparatus formaking plate glass comprising a tank furnace, a glass feeder for delivering glass from said furnace, parallel tracks disposed below andon opposite sides of said feeder, casting tables running on said tracks, a third track extending across and above said first-named tracks and below said feeder, a-carriage mounted on said last-named track for-reciprocation beneath said feeder, a pair of cooperating horizontal rolls mounted on 'said carriage with their adjacent surfaces spaced apart, said rolls being adapted to receive glass from said feeder between them, and a stopper adapted to be removably inserted below and between said rolls to prevent glass from flowing tween said rolls.

19. Apparatus for making. plate glass comprising a pair of cooperating rolls having their a stopper for the glass adapted to be inserted between and beneath said rolls to prevent the flow of glass between said rolls, and means for moving said stopper out of the path of movement of the glass. Y

20. Apparatus for making plate glass comprising a pair of cooperating rolls having their adjacent surfaces spaced apart,

rings secured removabl to the ends of one of said rolls and circu ar trimming knives carried by said rings.

In testimony whereof I, the said FLOYD V. Knssnmmn, have hereunto set In hand,

- FLOYD V. KESS LMKN.

adjacent surfaces spaced apart, f 

